Show nearby relevant objects when solving the quest

[matkoniecz]

While solving quests it would be very useful to show context. For example quest asking bicycle parking wold beneft from showing locations of nearby ones, as in some cases it
is possible to map them as separate pieces, or map them as one big object.

For example in the following case users being asked about bicycle parking capacity may be unsure whether they should answer "2" for a single stand in front, or count also capacity of other nearby bicycle parking.

Note that answer is not always the same, sometimes people map such objects as one (and answer is to count total capacity in the group) and sometimes as as a separate ones (and answer is to answer for each segment with its capacity).

Similar happens with at least power=pole material quest, "is XYZ still existing". And in general quests asking about POIs: recycling points, bus stops, toilets, drinking water points, shrines, ATMs, shops, information boards, charging points etc etc.

[matkoniecz]

It may also enable implementing #83 (no promises here, there were also other problems with this quest)

[matkoniecz]

That is #2354